JP2753692B2 - Large net construction method and its apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a large reinforced net and a device therefor (hereinafter simply referred to as a "method for constructing a large net and a device therefor"). The present invention relates to a large-scale net construction method and apparatus capable of freely constructing a large-scale net on a floor surface or a wall surface (including a ceiling surface) of a building or the like.

[0002]

2. Description of the Related Art In tunnel construction, for example, a reinforcing steel bar is laid in a grid pattern on the inner surface of a primary lining tunnel, and then a secondary lining concrete is applied by a movable iron formwork (centre, etc.). It is common practice to reinforce the tunnel from the inside. However, when rebars are assembled on site like this, a large number of rebars are forced to work in dangerous tunnels, and work safety, environmental hygiene, and securing of rebars become problems, and labor costs increase. There was a problem that it took a lot of time and effort to lengthen the construction period. Therefore,
In order to solve this problem, a method has been developed in which a large rebar net (hereinafter, referred to as a "large net") welded in advance in a factory is constructed using a lift truck. This one is
Large nets welded at the factory or bent at a predetermined curvature are lined up and down on the lifting section of a large lifting trolley running on the rails on the tunnel floor, as laid on the periphery of the tunnel, and the lifting trolley is run. Raise the lifting part and place each large net at a predetermined position on the tunnel peripheral surface, connect the large net to the mounting bracket embedded in the tunnel ground using hooks and bolts, etc. This is a method of connecting adjacent nets and constructing them.

[0003]

However, even in such a conventional large-sized net construction method, a large-sized and high-cost hoisting vehicle must be manufactured in accordance with the size of each tunnel. There was a big problem in terms of cost. In addition, before and after the construction of a large-sized net, rails must be laid and removed on the tunnel floor by the length of the tunnel, and there is a problem that the work associated with the construction takes time. In addition, since the lift truck is extremely large, it is an obstacle to traffic not only during construction of the large net, but also while the lift truck is stored in the tunnel, and the lift truck is Even when it is not, there is a problem that the rail laid for the trolley is in the way when the worker walks or carries other work equipment, and it is difficult to pass.

[0004] The present invention has been made in view of the above circumstances, can reduce equipment costs, does not require a preliminary work such as laying rails before and after the construction of the net, hardly hinders the traffic, and has the workability ( Increase in the amount of reinforcement work per unit man-hour,
It is an object of the present invention to provide a large-scale net construction method and a device capable of performing work with high accuracy in rebar arrangement while improving the work efficiency and the workability by a non-specialized technician.

[0005]

According to the present invention, there is provided a semiconductor device comprising:
The method for constructing a large-sized net described above is characterized in that a movable arm mounted on a self-propelled vehicle is operated, and a plurality of locations are gripped by gripping means attached to the arm, or large rebars are attracted by magnetic attaching means. The net is sequentially moved to a predetermined position on the construction wall and connected. In the large-sized net construction apparatus according to the second aspect, a gripping means capable of gripping a large-sized reinforcing steel net at a plurality of locations is detachably attached to a tip portion of an arm capable of turning the backhoe and rotating up and down.

According to a third aspect of the present invention, there is provided a large-sized net construction apparatus according to the second aspect, wherein the gripping means is detachably attached to a tip portion of the arm; A moving means attached to the moving side frame, the fixed side, a moving means provided between the moving side frame, the moving means for turning and moving the moving side frame in the width direction, a plurality of moving means disposed on the moving side frame, Abutment means each having an abutment member abutting on the large-sized rebar net, each abutment member capable of individually moving the abutment member in the thickness direction of the fixed side frame; And a connecting member, the other end of which is detachably hooked to the large rebar net. According to a fourth aspect of the present invention, there is provided the large-sized net construction apparatus according to the third aspect, wherein the connecting member has a chain lever hoist capable of adjusting a length of the chain. And
In the large-sized net construction device according to the fifth aspect, a magnetic attachment means capable of adsorbing the large-sized rebar net is detachably attached to a tip of an arm that can rotate and vertically move the backhoe.

[0007]

According to the method and the apparatus for constructing a large-sized net according to the first to fifth aspects, a self-propelled vehicle (for example, a backhoe) is run or an arm is moved to, for example, a large reinforced net placed on the floor (hereinafter referred to as a "reinforcing"). The gripping means and the magnetizing means are arranged on the "large net"). In the case of the gripping means, a plurality of portions of the large net are gripped. In the case of the magnetizing means, the large net is magnetized. From above, lift the large net by moving the arm upward, then move the self-propelled vehicle or move the arm, place the large net in a predetermined position on the construction wall, connect it to the construction wall, or Since the nets are connected to each other, there is no need for preliminary work such as laying rails before and after the construction of the nets, and the elimination of the rails does not easily obstruct the passage of workers and work equipment. In addition, it is possible to improve the workability such that the amount of rebar arrangement per unit man-hour can be increased, the work is easy, and the work can be performed by a non-specialized technician, and the construction with high rebar arrangement accuracy can be performed.

In the large net construction apparatus according to the third aspect, after the contact member of each contacting means is brought into contact with the large net, a large tension is applied between the contact member and the large net via the connecting member. The large net is lifted by moving the arm upward and the large net is tilted or dropped because the contact member and the large net are firmly fixed by the fastening force of the connecting member. Never do. Thereafter, the self-propelled vehicle is run or the arm is rotated to roughly move the gripped large net to a predetermined connection position, and then the moving frame is turned by the moving means in the direction of rotation of the large net. Fine displacement adjustment, fine displacement correction in the width direction of the large net by moving in the width direction of the fixed frame, and corresponding contact members are individually separated in the thickness direction of the fixed frame by the contact means. The position of the large net is accurately adjusted by correcting the tilt angle of the large net by moving the large net, so that the accurate alignment of the connection position of the large net can be easily performed. Furthermore, in the large-sized net construction device according to claim 4, when connecting the contact member and the large-sized net via the connecting member, using a chain lever hoist,
By adjusting the length of the chain, the large net can be fixed to the gripping means side or released without much effort.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a side view showing a working state of a large net on an upper part of a tunnel by a large net working apparatus according to a first embodiment of the present invention, and FIG. 2 is a side view showing a gripping work state of the large net. FIG. 3 is a side view showing a state of working a large net on the side wall of the tunnel, FIG. 4 is an enlarged sectional view of a main part of the gripping means, and FIG. 5 is a large net construction apparatus according to a second embodiment of the present invention. FIG. 6 is an enlarged rear view of a main part showing a gripping state of a large net according to a third embodiment of the present invention; FIG. 6 is an enlarged rear view of a main part showing a gripping state of the large net. FIG. 8 is an enlarged rear view of a main part showing a gripping state of the large net according to another embodiment of the present invention. FIG. Side view in use condition, FIG. 1
0 is an enlarged side view of the gripping means of the large-scale net construction apparatus according to the fourth embodiment of the present invention, FIG. 11 is an enlarged plan view of the gripping means, FIG. 12 is an enlarged rear view of the gripping means, and FIG. 11
S13-S13 sectional view of FIG. 14, FIG. 14 is a side view showing the state of construction of a large net on the tunnel side wall, FIG.
(A) is a side view showing a part of a large net construction work state on the tunnel upper wall part, and FIG. 15 (b) is a side view showing a remaining part of a large net construction work state on the tunnel upper wall part. ,
FIG. 16 is an enlarged side view of a main part of a large-scale net construction device according to still another embodiment of the present invention.

First, the first embodiment of the present invention will be described with reference to FIGS.
A method and apparatus for constructing a large-sized net according to the embodiment will be described. As shown in FIG. 1, a large-sized net construction device 10 of the first embodiment has a backhoe 11 for tunnel work, which is an example of a self-propelled vehicle, as a main body. 13 and a cockpit 14 are provided. The arm 13 includes a base arm 15 and a front arm 1.
And the first hydraulic cylinder 17
And the second hydraulic cylinder 18 so as to be rotatable in the vertical direction. At the tip of the front arm 16, a gripping substrate 21 having gripping claw structures 20, which are an example of a gripping means for the heavy-weight large net 19, arranged at four corners is pivotally mounted in the direction of the arrow.

As shown in a partially enlarged view of FIG. 1, a specific shaft mounting structure includes a pair of arm shaft mounting pieces 22 and link shaft mounting pieces 23 which are respectively disposed opposite to each other at the center of the original side surface of the gripping substrate 21. The front arm 16 is axially mounted on the arm shaft mounting piece 22 via a pin 24, and the pin 25
, The tip end of the front link 26 is journaled to the link journal piece 23. An original link 28 is pivotally mounted via a pin 27 near the distal end of the distal arm 16, and the original links 26, 28 are pivotally mounted via a pin 29. In addition, the tip of the rod 30a of the third hydraulic cylinder 30 attached to the front arm 16 is journaled to the pin 29. By moving the rod 30a of the third hydraulic cylinder 30 in and out, the former links 26 and 28 are bent first, and the grip substrate 21 is
Around the arrow in the direction of the arrow. Next, the grip claw structure 20 will be described in detail with reference to FIG.

As shown in FIG. 4, a claw moving window 31 which is substantially square in plan view is formed at each corner of the gripping substrate 21, and is fixed to the side of the claw moving window 31 on the center side of the substrate. Claws 32
Are formed in a protruding state. In addition, in the claw moving window 31,
A movable claw 33 movable in the direction of the arrow is arranged. The moving structure of the moving claw 33 has a protruding piece 34 formed on the original side surface of the side of the claw moving window 31 facing the fixed claw side,
A feed screw 36 is laid across the bush 35 between the projecting piece 34 and the base of the fixed claw 32 projecting from the base side surface of the gripping substrate 21.
, A nut 37 at the base of the movable claw 33 is screwed.

A guide groove 38 is formed on both inner side surfaces of the claw moving window 31 in a direction perpendicular to the arrow direction.
Protrusions 39 that slide along these guide grooves 38 are formed on both sides of the center of the movable claw 33. By rotating the handle 40 at the tip of the feed screw 36,
The feed screw 36 rotates, and the moving claw 33 moves in the direction of the arrow along the guide groove 38 to grip or release the horizontal streak 19 a of the large net 19. In FIG. 1, reference numerals 17a,
Reference numeral 18a is a rod, and reference numeral 41 is a mounting bracket for the large net 19 fixed to the peripheral surface of the tunnel.

Next, a method for constructing a large net using the large net construction apparatus 10 will be described. As shown in FIG. 2, the arm 1 of the backhoe 11 provided in the tunnel
3 and a gripping substrate 21 attached to the tip of
Are exchanged by removing and inserting the pins 24 and 25. Next, if necessary, the backhoe 11 is run, the swivel table 12 is swiveled left and right, and the arm 13 is swung up and down, so that the large net 1 loaded in the tunnel net storage space is loaded.
The arm 13 is moved above the position 9. Then arm 1
3 is rotated downward to lower the gripping substrate 21, and while correcting the position as necessary, the toes of the fixed claws 32 of the gripping claw structure 20 disposed at the four corners of the gripping substrate 21 and the moving claws 33 A horizontal streak 19a of the large net 19 is arranged between the toe and the toe, and then the operator turns the handle 40 to the gripping side to move the movable claw 33 in the direction of the fixed claw 32, and the horizontal streak 19a
Is firmly gripped by both claws 32, 33 (see FIG. 4).

Subsequently, the arm 13 is turned upward to lift the large net 19, and then, as shown in FIG.
Adjusting the protrusion length of the rod 30a of the hydraulic cylinder 30 in accordance with the curvature of the side wall of the tunnel peripheral surface.
The holding substrate 21 is rotated until the stand 9 rises, and then the backhoe 11 is advanced in the same state, and the large net 19 is pressed against the side wall of the tunnel peripheral surface. Then, the large metal 19 is attached to the mounting bracket 4 embedded in the peripheral surface of the tunnel by, for example, an operator's manual operation using a line.
Fasten to 1. After the fastening, the operator rotates the handle 40 of the grip claw structure 20 in the grip release direction to release the gripping state of the horizontal streak 19a. It should be noted that the fastening of the parts that cannot be reached by the operator and the operation of the handle 40 are performed, for example, by the operator riding on a lifting platform of a work vehicle (not shown). Next, the arm 13 is operated to dispose the gripping substrate 21 on the next large net 19, grip the horizontal line 19a with the gripping claw structure 20, and then, as shown in FIG. The next large net 19 is arranged on the upper part of the large net 19 attached to the first part in a state of being partially overlapped, and tightened and fixed in the same manner as above. At this time, the upper and lower large-sized nets 19 are fastened to each other with a track. Thereafter, the same operation is repeated, and the large net 19 is laid on the entire tunnel peripheral surface and the tunnel floor.

As described above, by utilizing the backhoe 11 permanently installed at the tunnel construction site, the backhoe 11
A grip board 21 provided with a gripping claw structure 20 for a large net 19 is attached to the tip of the arm 13 of this example, and the large net 19 is gripped and moved to the tunnel peripheral surface or the tunnel floor using this. The equipment cost is extremely low compared to the construction using a large hoisting trolley manufactured according to the size of the conventional tunnel, and there is no need for additional rail laying work and rail removal work before and after the net construction. Since the construction period can be shortened and the backhoe 11 is relatively small in comparison with the size of the tunnel, it does not hinder the traffic in the tunnel during construction. Moreover, it is easier to pass because there is no rail. In addition, by doing so, the workability (increase in the amount of reinforcing work per unit man-hour,
(The work is simple and work by non-specialized technicians is also possible.)

Next, a second embodiment of the present invention will be described with reference to FIGS.
A method and apparatus for constructing a large-sized net according to the embodiment will be described. As shown in FIG. 5, the large-sized net construction device 50 of the second embodiment is an example having a holding substrate 52 that is detachably fastened to the bucket 51 of the backhoe 11. A gripping claw structure 20 having the same structure as that of the first embodiment is provided, and the same components are denoted by the same reference numerals and description thereof will be omitted. In the vicinity of the center of one end of the original side surface of the grip substrate 52, a key-shaped thick attachment frame 53 whose tip extends to the center of the grip substrate 52 is formed. A handle 54 is fixed to the base of the nut portion formed through the tip of the mounting frame 53, and a fastening screw 55 for detachably fastening the large-sized net construction device 50 to the scooping portion 51 a of the bucket 51 is provided. It is screwed. In addition, even if the large-sized net construction device 50 is not a large-sized device as shown in FIGS. 5 and 6, for example, the mounting frame 53, the pair of gripping claw structures 20, and the fastening screw 55 are mounted on a narrow gripping substrate. A plurality of attached small ones may be used.

In using the large net construction apparatus 50 of the second embodiment, the arm 13 is operated to
The scooping portion 51a is inserted into a gap between the gripping substrate 52 and the mounting frame 53, and then the handle 54 is rotated to the tightening side, and the gripping substrate 52 is securely fastened to the scooping portion 51a by the tightening screw 55. . After that, the large net 19 is gripped by the gripping claw structure 20 and the arm 13 is rotated, and the large net 1 is integrated with the bucket 51.
9 is moved to a predetermined position. As described above, in the second embodiment, since the backhoe 11 can be used with the bucket 51 attached, the work of replacing the bucket 51 becomes unnecessary, and the construction work is further facilitated.

Next, a third embodiment of the present invention will be described with reference to FIGS.
A method and apparatus for constructing a large-sized net according to the embodiment will be described. As shown in FIGS. 7 and 8, the large-sized net construction device 60 according to the third embodiment includes a fastening chain 62 detachably attached to a latch 61 fixed to an upper rear surface of a bucket 51, and a bucket 51. And a fastening jig 63 that is removably fastened to the scooping portion 51a. Fastening jig 63
Has a main body member 64 that is a U-shaped thick iron plate, and a fastening screw 65 is screwed into a nut portion formed at the tip of one parallel piece 64a of the main body member 64. A hook 66 that can be hooked on the horizontal streak 19 a of the large net 19 is fixed to the back surface of the base of the other parallel piece 64 b of the main body member 64. Note that the fastening jig 63 may be one in which the main body member 64 is elongated and a plurality of fastening screws 65 and hooks 66 are attached.

In using the large-sized net construction device 60 of the third embodiment, a hook 67 fixed to the tip of the tightening chain 62 is hooked on the horizontal line 19a of the large-sized net 19, and then a fastening jig is used. The main body member 64 is attached to the central portion of the scooping portion 51a of the bucket 51 while the hook 66 of the 63 is hooked on the horizontal line 19a, and the fastening jig 63 is attached to the bucket 51 by tightening the fastening screw 65. . Then, the length of the tightening chain 62 is reduced by the length adjusting portion 62a, and the large net 19 is
The first scooping portion 51a is brought into contact with the wall surface on the side of the scooping portion 51a so as not to move. The laying operation of the large net 19 is almost the same as in the second embodiment. As described above, the large-sized net construction device 60 of the third embodiment further simplifies the device, so that the cost can be further reduced.

Next, a method and an apparatus for constructing a large net according to a fourth embodiment of the present invention will be described with reference to FIGS. Here, for convenience of description, the long width direction of the fixed side frame 71 described below is defined as the X direction, the short width direction is defined as the Y direction, and the thickness direction is defined as the Z direction. The vertical direction in the description refers to the vertical direction in FIGS. As shown in FIGS. 10 to 13, the fourth embodiment is different from the fourth embodiment in that the movement of the arm 13 of the backhoe 11 is rough in terms of its function, so that it is difficult to adjust the large net 19 to an accurate connection position. This problem has been solved by adding a special structure to the gripping means 70 side. Hereinafter, its specific structure and operation will be described.

The entire structure of the gripping means 70 is such that a fixed frame 71 is detachably attached to the distal end of the arm 13, and the fixed frame 71 can be turned and moved in the width direction by the moving means 73. 72 are provided. The moving frame 72 has a contact member 98 that is in contact with the large net 19, and a contact unit 99 that individually moves each contact member 98 in the thickness direction of the fixed frame 71. , Are arranged. Also,
Separately, a connecting member 110 having one end connected to the contact member 98 and the other end detachably hooked to the large net 19 is also provided. The fixed-side frame 71 is a frame member assembled in a substantially quadrangular shape in plan view. A rectangular movable-side frame 72 in plan view is arranged around the fixed-side frame 71.

The moving means 73 is provided between bearings 74a, 7a near the center of the frame member 72a on the short width side of the moving side frame 72.
It has a feed screw 75 which is suspended via the 4b. The feed screw 75 is screwed into a nut 77 provided on the fixed side frame 71, and the frame member 72 on the bearing 74b side.
The sprocket 79 fixed to the output shaft, the sprocket 80 fixed to one end of the feed screw 75, and the two sprockets 7
The power is transmitted to the feed screw 75 side by a chain-type power transmission system including a chain 81 spanned between 9, 80. Note that the chain type power transmission system is protected by a casing 82.

Further, a pair of guide rods 83 are suspended between both ends of the frame member 72a, and each of the guide rods 83 projects outwardly from both ends of the fixed frame 71 on the short width side. Four guide rings 83a are loosely inserted. By the feed motor 78, the sprocket 79
Is rotated, the feed screw 75 is rotated by the chain 81, and the movable frame 72 moves in the X direction along the guide rod 83 around the fixed frame 71 fixed to the arm 13 side.

On the upper part of the fixed frame 71, a connection base 86 to the arm 13 is pivotably mounted via a pivot mechanism 85 of the movable frame 72. The connection base 86 is a rectangular member in a plan view, and is connected to the front arm 16 of the backhoe 11 or to the front link 26 via pins 24 and 25 on both ends thereof. A pair of thick connecting plates 87 are provided upright. Next, with reference to FIGS.
Will be described.

As shown in FIGS. 10, 12, and 13, the turning mechanism 85 has a turning shaft 88 protruding from the lower surface of the center of the connecting base 86.
Is pivotally supported by a large bearing 89 provided at the center of the shaft. The tip of the turning shaft 88 has a bearing 89.
The worm wheel 90 projects downward, and the worm wheel 90 is fixed to the projected portion. On the lower surface of one end of the moving frame 72, a turning motor 92 fixed via a bracket 91 and a bearing 93 directly fixed to the moving frame 72 are arranged at a predetermined interval from each other. In addition, a rotating shaft 94 is suspended between the two members 92 and 93.
The worm wheel 90 is provided at an intermediate portion of the rotation shaft 94.
The worm gear 95 meshed with is fixed. When the rotation shaft 94 is rotated by the turning motor 92, the connection frame 8 is rotated via the worm wheel 90 and the worm gear 95.
6 turns to 150 ° in both the left and right directions (see FIG. 11). However, in practice, since the connecting frame 86 is attached to the arm 13, the fixed frame 71 turns to the same angle.

The turning mechanism 85 includes a fixed frame 7.
For example, the large-sized nets 19 that have been stacked are transferred to another location on the casing 96 side surfaces at both ends in the width direction of the moving-side frame 72 which are fixed to the casing 96. At this time, a hook 97 such as a hanging wire for hanging the large net 19 is protruded. Next, referring to FIGS.
The four abutting members 98 abutting on the fixed frame 7
The contact means 99 which can be individually moved in the thickness direction will be described in detail.

The four abutting means 99 are mounted on the moving side frame 7.
2 has a contact motor 100 standing upright via a bracket 100a on each corner. An output shaft 100b;
The screw-shaped rod 102 extending downward is connected via a coupling, and the rod 102 is held by a bearing 101 fixed to the moving frame 72. At the lower end surface of the contact member 98, a contact claw 103 that directly contacts the large net 19 is fixedly attached to the distal end of the contact member 98. On the other hand, a nut holder 104 in which a nut (not shown) for a screw jack is housed is fixed above the contact member 98, and the rod 102 is
It is screwed to a nut outside this figure. Further, a bracket 104b having a hook hole 104a protrudes from the peripheral side surface of the nut holder 104. A relatively thin guide rod 105 extending in the Z direction extends on the bracket 104b, and the corresponding guide ring 106 is fixed to the peripheral side surface of the lower end of the bearing 101. When the output shaft 100b of the contact motor 100 is rotated, the rod 102 rotates via the coupling, and the integrated contact member 98 and the nut holder 104 move in the Z direction along the guide rod 105. . The devices of the moving means 73 and the contact means 99 are collectively controlled by a control panel (not shown), and are operated by a remote control (including wireless and wired) 107 (see FIG. 14) at hand of the operator. I can do it.

As shown in FIG. 12, the large net 19 and the gripping means 70 are connected to each other by a hook hole 104a formed in each bracket 104b of the contact means 99 and the large net 19 as shown in FIG.
And a connecting member 110 provided with a chain lever hoist 109 having an adjustable length in the middle of the chain 108.
It is performed by The contact claw 1 of each contact member 98
03 in contact with the horizontal stripe 19a of the large net 19,
A hook 1 at one end of the chain 108 is inserted into each of the hook holes 104a.
11, the hook 112 on the other end of the chain 108 is hooked on the large net 19, and then each chain 108 is tightened by each chain lever hoist 109, so that the large net 19 is held on the gripping means 70. It is fixed firmly.

Since the connecting member 110 having the chain lever hoist 109 capable of adjusting the length of the chain 108 is employed as described above, the large net 19 is fixed to the gripping means 70 without much effort. Or
Can be unlocked. In FIG.
Reference numeral 3 denotes a ladder, reference numeral 114 denotes a sky master, reference numeral 115 denotes a gondola of the sky master 114, and reference numeral 116 denotes an inverted reinforcing bar projecting from a tunnel floor.

Next, a large net construction method using the large net construction apparatus 70 according to the fourth embodiment will be described. First, as shown in FIG. 12, by operating the backhoe 11 of the driver, the gripping means 70 is arranged above and near the large net 19 placed in the net storage place of the tunnel. The hook 111 of the chain 108 is engaged with the hook hole 104 in a state in which
a, the hook 112 is hooked on the horizontal line 19a of the large net 19, and then the chain lever hoist 109 is hooked.
The chain 108 is tightened to firmly fix the large net 19 to the gripping means 70. In addition, hook 1
If the horizontal streaks 19a on which the hooks 12 are hooked are to be brought into contact with the abutting claws 103, the chain lever hoist 10 will be
9a by tightening the chain 108 using
Can be prevented from bending. Then, the arm 13 of the backhoe 11 is moved upward to lift the large net 19, and at this time, the large net 1 is moved by the four connecting members 98.
Since the 9 and the contact means 99 are firmly fixed, there is no fear that the large net 19 will shift during the lifting or a fall accident will occur. Then, running of the backhoe 11,
By rotating the arm 13 or the like, the gripped large net 19 is roughly moved to a predetermined connection position.

Subsequently, the worker in the tunnel operates the remote control 1
07, the moving means 73 performs fine positioning of the large net 19. Specifically, the feed motor 78 rotates the feed screw 75 and
2 is moved by a predetermined length in the X direction, that is, in the long width direction of the fixed side frame 71, to correct the lateral position of the large net 19, and the turning motor 92 of the turning mechanism 85 moves the moving side frame 72. By turning the right and left directions by an arbitrary angle to correct the position of the large net 19 in the rotational direction, the contact members 98 are individually moved by a predetermined length by the contact motor 100 of the arbitrary contact means 99. To correct the inclination angle of the large net 19. Thereby, in the first to third embodiments, the backhoe 11
In this embodiment, accurate positioning can be performed in a short period of time, while the positioning of the large net 19 is troublesome.

Here, referring to FIG. 14, the method of installing the large net 19 on the side wall of the tunnel will be described in detail.
After the large net 19 is pressed against the mounting bracket 41 protruding from the tunnel side wall by the above-described operation, the worker standing on the tunnel floor faces the inverting reinforcing bar 116 planted at the end of the tunnel floor. The lower end of the large net 19 is fastened with, for example, a pipe clip or a track, and the worker who climbs the ladder attaches the central part of the large net 19 to the mounting bracket 41 at the middle part of the tunnel side wall. Fastening is performed using a fastening member. Then, the operator on the side of the ladder 113 loosens the chain 108 using the chain lever hoist 109 so that the lower connecting member 11
Remove 0. Next, the contact member 98 of the upper contact means 99
, And the upper side of the large net 19 slightly inclined toward the inside of the tunnel is pushed into the side wall of the tunnel, and a worker climbing on the gondola 115 of the sky master 114 mounts the mounting bracket on the upper part of the side wall of the tunnel. 41
Then, the upper part of the large net 19 is fastened.

Next, referring to FIG. 15, a method of constructing the large net 19 on the tunnel ceiling will be described. After the large net 1a is laid on the left and right tunnel side walls, the arm 13 of the backhoe 11 is moved overhead. The large net 19 is lifted high and the large net 19 for the ceiling is fastened to the left and right sides.
Press in between. At this time, first, only one end (here, the left end) of the large net 19 is pressed against the end of one large net 19, and the left half of the large net 19 is fastened using the Skymaster 114 in the same manner. Then, after removing the left connecting member 110, the contact member 98 of the contact means 99 on the other end side (here, the right end side) is made to protrude, and the large net 19
Push the right end of the to the tunnel ceiling side and tighten. Finally, the right connecting member 110 is also removed, and the arm 13 is rotated downward, whereby the construction of the large net 19 for one section of the inner surface of the tunnel is completed.

Although the present invention has been described above, the present invention is not limited to these embodiments, and any changes such as design without departing from the scope of the present invention are included in the present invention. For example, in the embodiment, the backhoe is shown as the self-propelled vehicle. However, the present invention is not limited to this, and any vehicle that can perform automatic traveling without requiring a rail may be used. Further, the holding means of the large net is not limited to the embodiment as long as it can hold a plurality of portions of the large net. Also, the number of installations is not limited to four, but may be any number.

In the embodiment, the gripping means is employed for fixing the large net to the arm. However, the present invention is not limited to this. For example, as shown in FIG. The large net 19 may be attached and attached to the mounting board 69 at the tip of the arm 13 so as to attract and lift the large net 19 by the magnetic force of the electromagnet 68 when energized. As described above, if the magnetic attachment means is used, the large net 19 can be used.
Arm mounting work becomes easier. Further, a fixing method using a combination of a hook and a pin may be used. In the embodiment, the case of handling a large net for a tunnel is shown. However, the present invention is not limited to this, and may be applied to, for example, the construction of a large net laid on a floor or a wall of a building. .

The moving means in the fourth embodiment is not limited to the structure of the embodiment, but may be any structure as long as the moving frame can be turned and moved in the width direction. May be. Also, the number of abutting means provided on the moving side frame is not limited to four as in the embodiment, but may be two, three or five or more, and the structure is not limited. For example, as shown in FIG.
7, a thick hard rubber ring 119 is interposed between the contact member 98 and the contact claw 103, and the members 98 and 103 are loosely fastened by bolts 118 loosely inserted into the ring. Is also good. Thus, if the hard rubber ring 119 is interposed between the two members 98 and 103, the connecting member 1
The degree of freedom of the connection between the large net 19 and the gripping means 70 by means of 10 and the degree of freedom of the positioning of the large net 19 when connecting the nets are increased.

In the fourth embodiment, a connecting member having a chain lever hoist capable of adjusting the length of the chain is employed as the connecting member. However, the present invention is not limited to this.
It may be a simple chain or a wire that can be adjusted in length by connecting a turnbuckle or the like. Further, in the fourth embodiment, the moving direction of the moving-side frame is the long-width direction of the fixed-side frame. However, the moving direction is not limited to this, and as described in the section of the means for solving the problems. Alternatively, the direction may be any direction in the plane including the width direction of the fixed side frame.

[0039]

According to the method and the apparatus for constructing a large net according to the first to fifth aspects, the holding means or the magnetic attaching means for the large net is attached to the movable arm as described above, and the large net held by the holding means. Or the large net adsorbed by the magnetic attachment means is arranged at the predetermined position of the construction wall and connected, so the equipment cost can be reduced, and preliminary work such as laying rails before and after the net construction is unnecessary,
It is hard to get in the way of traffic. In addition, the workability (increase in the amount of reinforcing work per unit man-hour, easy work, and work by non-specialized technicians is also possible) can be improved, and work with high accuracy of reinforcing work can be performed. In particular, in the large-sized net construction apparatus according to claim 3, when the net connection is adjusted in this manner, the moving frame is moved by the moving means in the width direction of the frame, or the selected contact means is used. Since the predetermined contact members are individually moved in the thickness direction of the moving side frame to enable fine positioning of the large net, accurate positioning of the connection position of the large net is simplified.

Further, in the large-sized net construction device according to the fourth aspect, when connecting the contact member to the large-sized net, the length of the chain connected between both members is adjusted by using a chain lever hoist. Thus, the large net can be fixed to the gripping means or released without much effort.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a large-sized net is constructed on an upper portion of a tunnel by a large-sized net construction device according to a first embodiment of the present invention.

FIG. 2 is a side view showing a gripping state of the large net.

FIG. 3 is a side view showing a state in which a large-sized net is constructed on the side wall of the tunnel.

FIG. 4 is an enlarged sectional view of a main part of the gripping means.

FIG. 5 is an enlarged side view of a main part showing a state in which a large net is gripped by a large net construction apparatus according to a second embodiment of the present invention.

FIG. 6 is an enlarged rear view of a main part showing a gripping state of the large net.

FIG. 7 is an enlarged side view of a main part showing a state in which a large net is gripped by a large net construction apparatus according to a third embodiment of the present invention.

FIG. 8 is an enlarged rear view of a main part showing a gripping state of the large net.

FIG. 9 is a side view of a large-sized net construction device according to another embodiment of the present invention in use.

FIG. 10 is an enlarged side view of a gripping means of a large-scale net construction device according to a fourth embodiment of the present invention.

FIG. 11 is an enlarged plan view of the gripping means.

FIG. 12 is an enlarged rear view of the gripping means.

FIG. 13 is a sectional view taken along S13-S13 of FIG. 11;

FIG. 14 is a side view showing a state in which a large-sized net is constructed on the side wall of the tunnel.

FIG. 15 (a) is a side view showing a part of a state in which a large net is constructed on the upper wall portion of the tunnel. (B) It is a side view which shows the remainder of the construction operation | work state of the large net to the tunnel upper wall part.

FIG. 16 is an enlarged side view of a main part of a large-scale net construction device according to still another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Large net construction apparatus 11 Backhoe 12 Turning table 13 Arm 14 Cockpit 15 Base side arm 16 Front side arm 17 First hydraulic cylinder 17a Rod 18 Second hydraulic cylinder 18a Rod 19 Large net 19a Horizontal streak 20 Gripping claw structure Body 21 Gripping substrate 22 Arm shaft attachment piece 23 Link shaft attachment piece 24 pin 25 pin 26 Front link 27 pin 28 Base link 29 pin 30 Third hydraulic cylinder 30a Rod 31 Claw moving window 32 Fixed claw 33 Moving claw 34 Protrusion Piece 35 bush 36 feed screw 37 nut portion 38 guide groove 39 convex portion 40 handle 41 mounting bracket 50 large-sized net construction device 51 bucket 51a scooping portion 52 gripping substrate 53 mounting frame 54 handle 55 fastening screw 60 large-sized net construction device 61 hook Hardware 6 Tightening chain 62a Length adjuster 63 Tightening jig 64 Main body member 64a Parallel piece 64b Parallel piece 65 Tightening screw 66 Hook 67 Hook 68 Electromagnet 69 Mounting board 70 Gripping means 71 Fixed frame 72 Moving frame 72a Frame member 73 Means 74a Bearing 74b Bearing 75 Feed Screw 77 Nut 78 Feed Motor 79 Sprocket 80 Sprocket 81 Chain 82 Casing 83 Guide Rod 83a Guide Ring 85 Rotating Mechanism 86 Connection Stand 87 Connecting Plate 88 Rotating Axis 89 Bearing 90 Worm Wheel 91 Bracket 92 Rotating Motor 93 Bearing 94 Rotating shaft 95 Worm gear 96 Casing 97 Hook 98 Contact member 99 Contact means 100 Contact motor 100a Bracket 100b Output shaft 101 Bearing 1 02 Rod 103 Contact Claw 104 Nut Holder 104a Hook Hole 104b Bracket 105 Guide Rod 106 Guide Ring 107 Remote Control 108 Chain 109 Chain Lever Hoist 110 Connecting Member 111 Hook 112 Hook 113 Ladder 114 Skymaster 115 Gondola 116 Inverted Rebar 117 Contacting Means 118 bolt 119 hard rubber ring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Bantohira 2-1-1-18 Higashiko, Kokurakita-ku, Kitakyushu-shi, Fukuoka

Claims (5)

(57) [Claims] A movable arm mounted on a self-propelled vehicle is operated, and a large rebar net that is gripped at a plurality of locations by gripping means attached to the arm or is attracted by magnetically attaching means is provided. A large net construction method characterized by sequentially moving and connecting to a predetermined position on a construction wall. 2. A large net construction apparatus wherein a gripping means capable of gripping a large rebar net at a plurality of positions is detachably attached to a tip of an arm which can rotate and vertically move a backhoe. 3. The holding means is provided on a fixed frame detachably attached to a tip end of the arm, a moving frame attached to the fixed frame, and between the fixed and moving frames. Moving means for rotating and moving the moving side frame in the width direction, and a plurality of contact members provided on the moving side frame, each of which is in contact with the large-sized rebar net. A contact means capable of individually moving each contact member in the thickness direction of the fixed side frame, and a connection in which one end is connected to the contact member, and the other end is detachably hooked to the large-sized rebar net. The large-sized net construction device according to claim 2, comprising a member. 4. The large net construction apparatus according to claim 3, wherein the connecting member has a chain lever hoist capable of adjusting a length of the chain. 5. A large net construction apparatus characterized in that magnetic attachment means capable of adsorbing a large rebar net is detachably attached to a tip of an arm which can rotate and vertically move a backhoe.